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All Journal Jurnal Dinamis SEMIRATA 2015 Journal of Aceh Physics Society Jurnal Ikatan Alumni Fisika Universitas Negeri Medan Science and Technology Indonesia Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Chemistry Jurnal Natural

Timbangen Sembiring

Physics Department, FMIPA Universitas Sumatera Utara – Medan Indonesia

Author-ID : 375562

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Neuroscience Physics Social Sciences Other

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CHARACTERIZATION OF NATURAL IRON SAND FROM KATA BEACH, WEST SUMATRA WITH HIGH ENERGY MILLING (HEM) Martha Rianna; Timbangen Sembiring; Marhaposan Situmorang; Candra Kurniawan; Eko Arief Setiadi; Anggito P Tetuko; Silviana Simbolon; Masno Ginting; Perdamean Sebayang
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Iron sand is one of the natural resources in West Sumatra that has not been optimally utilized. One of the potential locations to get this iron sand deposits is the coast of Kata. This study aims to analyze the content and size of the iron grains found on the coast of Kata Padang Beach, West Sumatera Province. Coastal sand samples are extracted using permanent magnets to separate magnetic and non-magnetic materials. Characterization of iron sand using Scanning Electron Microscopy with Energy Dispersive X-ray (SEM-EDX) and Vibrating Sample Magnetometer (VSM). The result of characterization using SEM-EDX shows that iron sand samples contain Fe and O elements derived from Phase Magnetite (Fe3O4). Keywords: iron sand, magnetic materials, SEM-EDX, VSM

COMPARISON OF ENERGY DOSES 10 MV DISTRIBUTION USING PERCENTAGE DEPTH DOSE (PDD) METHOD ON LINAC: ELECTA AND SIEMENS Martha Rianna; Herty Afrina Sianturi; Hariyati Lubis; Awan Pelawi; Timbangen Sembiring; Marhaposan Situmorang
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v18i2.11133

The patient dosing on Linac (Electa and Siemens) can be determined by Source Surface Distance (SSD) technique using Precentage Depth Doses (PDD) method. The study was conducted by measuring PDD to compare the dosage distribution calculations on Linac Electa and Siemens device of photon energy at 10 MV. PDD is done with a 100 cm SSD technique at a depth of 0 to 25 cm. The dose distribution results between the Electrical and the Siemens PDD are almost the same in that the Dmax at 10 MV Siemens photon energy occurs at a depth of 20 mm while the 10 MV Electa photon energy occurs at a depth of 21 mm. Both Linac Electa and Siemens device this at the same energy of 10 MV there is a difference of 95.23%.Keywords: Distrubusi dose, PDD, Photon Energy, Quality File Index

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v18i2.11163

Micro-Magnetic Activity of the Fabricated MnFe2O4 via Co-Precipitation from Natural Iron Sand Rianna, Martha; Hussain, Muhammad Khalid; Sembiring, Timbangen; Guk-Guk, Herwati Permata Indah Raja; Sitorus, Kurnia Jesiska; Setiadi, Eko Arief; Tetuko, Anggito P.; Sebayang, Perdamean
Science and Technology Indonesia Vol. 10 No. 1 (2025): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.1.221-227

This study explores the micromagnetic behaviour of MnFe2O4 derived from natural iron sand through the coprecipitation method, without the need for calcination. Using manganese chlo-ride and iron sand as precursors, one can create MnFe2O4. Through the utilisation of X-ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Vibrating Sample Magnetometer (VSM), one can effectively analyse and understand the crystal structure, morphology, and magnetic properties. The crystal size was reduced by a fac-tor of 0.40 nm, as revealed by XRD crystal structure analysis. Additionally, the XRD results indicated the absence of impurities, confirming the presence of a single phase. In addition, the SEM analysis revealed that samples 1, 2, and 3 underwent agglomeration. The particles have a cubic shape. The analysis using EDX indicates that there are no other elements present in the Mn, Fe, and O. Additionally, the VSM analysis confirms that the sample exhibits magnetic hardness. Sample 1 exhibits exceptional magnetic properties, with Ms values of 217.53 emu/g, Mr 34.27 emu/g, and Hc 127.42 emu/g. Photoluminescence (PL) spectroscopy was used to observe the optical properties of MnFe2O4. Sample 1 exhibits a distinct emission spectrum at 440 nm, representing the purple band. Sample 2 displays a sharp emission spectrum at 448 nm, indicating the blue band. Lastly, Sample 3 demonstrates a clear emission spectrum at 427 nm, signifying the purple band.

A Adjustable power supply assembly and training on the physics laboratory at YPK Masehi Berastagi Tarigan, Kerista; Timbangen, Timbangen Sembiring; Simamora, Widya; Simamora, Berto; Simatupang, Robin
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Adjustable power supply assembly and training have been conducted to private YPK Berastagi high school students in Berastagi District, Karo. This activity was carried out in partnership with the University of North Sumatra in the form of community service. The purpose of the training and making of this study program is to improve the teaching activities of the theory and practice of the field of electronic physics to partners. The training and making of the study program were carried out using the theory understanding method, assembling and testing it. The main components and functions used are the 220V 5A step down transformer, 5A rectifier diodes as dc rectifiers, 4700 ÂµF electrolyte capacitors as filters, and IC LM 317 regulators as voltage regulators and are equipped with current amplifiers, 2SA 73 transistors and 2SC 41 Based on test and analysis data obtained by students (i), the output voltage can be adjusted from 1.27 - 24.62 volts with a maximum current of 3A. While the ripple voltage, Vr pp = 0.1 Volt. obtained mV. Based on the PS test results of assemblies against the burden of motorcycle lights, 40 Watt works well. Based on these results, the PS can be used.

Empowering the Community Through Candlenut Peeling Machine Training and Mentoring in Sembahe Village Sembiring, Timbangen; Hamid, Muhammadin; Sianturi, Herty Afrina; Devi Yolanda Simangunsong; Maria Derani Ester Vania Situngkir; Ayu Wahyuni Batubara; Eva Purwanti; Martinez Lumbantobing; M Zidan Davy
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 10 No. 1 (2025): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v10i1.18402

A candlenut peeling machine is a technological innovation aimed at improving the efficiency of separating candlenut seeds from their shells. Hand-peeling candlenuts requires a lot of time and effort, and it carries a high risk of damaging the candlenut kernels due to uneven impact. This candlenut peeling machine is equipped with a mechanism that reduces seed damage and increases productivity. The machine can be operated manually or semi-automatically and works on the principle of utilizing pressure and friction to break the shell without damaging the seeds inside. Experimental results show that this machine has a high success rate in separating candlenut seeds from their shells and reduces the number of damaged seeds compared to traditional methods. The use of this machine aims to increase the productivity of candlenut farmers and add value to the candlenut processing industry.

Co-Authors Achmad Maulana Soehada Sebayang Agung Imaduddin Anggito P Tetuko Anggito P. Tetuko Anggito P. Tetuko, Anggito P. Awan Pelawi Ayu Wahyuni Batubara Candra Kurniawan Cindy Al Kindi Devi Yolanda Simangunsong Eko Arief Setiadi Eko Arief Setiadi Eko Arief Setiadi, Eko Arief Eko Pudjadi, Eko Erna Frida Eva Purwanti Ferry Rahmat A. Bukit Fitri Handayani Fynnisa Zebua Guk-Guk, Herwati Permata Indah Raja Hamid, Muhammadin Hariyati Lubis, Hariyati Herty Afrina Sianturi Herty Afrina Sianturi Hussain, Muhammad Khalid Ivo Andika Hasugian Junedi Ginting M Zidan Davy Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Maria Derani Ester Vania Situngkir Martha Rianna Martha Rianna Martha Rianna Martinez Lumbantobing Masno Ginting Mester Sitepu, Mester Moraidah Hasanah Motlan . Muhammad Syafii Muhammadin Hamid Nimpan Bangun Perdamean Sebayang Perdamean Sebayang Perdamean Sebayang Pius Sebleku Rahmadsyah Rahmadsyah Rita Juliani Sianturi, Herty Afrina Silviana Simbolon Simamora, Berto Simamora, Widya Simatupang, Robin Sitorus, Kurnia Jesiska Sitorus, Meida Syahrul Humaidi, Syahrul Tarigan, Kerista Tua Raja Simbolon Wina Rahmadani Rangkuti Yoga Pratama Zuriah Sitorus

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